Queensland 4D11½ Abt class locomotive

Queensland Railways 4D11½ Abt class
Mount Morgan track locomotive no. 339 built by Dubs
Type and origin Power type Steam Builder Dübs & Co Serial number 3619, 3620 Build date 1898 Total produced 2
Specifications Configuration: ​  • Whyte 0-4-2RT Gauge 1,067 mm (3 ft 6 in) Fuel type Coal Water cap. 600 imp gal (2,700 L; 720 US gal) Cylinders 2 Cylinder size 11.5 in × 16 in (292 mm × 406 mm) Loco brake Westinghouse air Le Chatlier
Career Operators Queensland Railways Numbers 339, 340 Disposition both scrapped

The Queensland Railways 4D11½ Abt class locomotive was a class of 0-4-2RT steam locomotives operated by the Queensland Railways.

History

In October 1898, two Dübs & Co locomotives entered service. Per Queensland Railway's classification system they were designated the 4D11½ Abt class, the 4 representing the number of driving wheels, the D that it was a tank locomotive, and the 11½ the cylinder diameter in inches.

They were built to assist conventional locomotives up and down a steeply graded rack railway section of the Central Western line at Mount Morgan.

Class list

Number	Works number	In service	Condemned
339	3619	October 1898	September 1916
340	3620	October 1898	December 1922